Hydrates are substances that include water (H20) in their formula.
Their chemical formula is written as:
_ (chemical) . #H20
and it is called: chemical (number ex. penta, tetra, di, tri....) hydrate.
For instance, one hydrate used in this experiment is sodium sulfate decahydrate.
The chemical formula would be NaSO4 . 10H2O which means for every NaSO4 there are 10 water molecules. However, this does not mean that the substance is wet. In fact, most hydrates have a dry appearance and touch.
Link: http://dbhs.wvusd.k12.ca.us/webdocs/Nomenclature/Hydrate-Problem-Ans.html
-Lowell Kwan
ENTRY 2
hydrates: ionic compounds are formed in water and then isolated as solids, water molecules are trapped into the substance....making hydrates
since the compound is ionic, it can also be called ionic salts
anhydrous compound: "substance w/o water". this is what is leftover when all the water is evaporated from the hydrate. It can be calculated as: mass of hydrate = mass of anhydrous + mass of water
WHAT ARE HYDRATES?
ENTRY 1
Hydrates are substances that include water (H20) in their formula.Their chemical formula is written as:
_ (chemical) . #H20
and it is called: chemical (number ex. penta, tetra, di, tri....) hydrate.
For instance, one hydrate used in this experiment is sodium sulfate decahydrate.
The chemical formula would be NaSO4 . 10H2O which means for every NaSO4 there are 10 water molecules. However, this does not mean that the substance is wet. In fact, most hydrates have a dry appearance and touch.
Link: http://dbhs.wvusd.k12.ca.us/webdocs/Nomenclature/Hydrate-Problem-Ans.html
-Lowell Kwan
ENTRY 2
- hydrates: ionic compounds are formed in water and then isolated as solids, water molecules are trapped into the substance....making hydrates
- since the compound is ionic, it can also be called ionic salts
- anhydrous compound: "substance w/o water". this is what is leftover when all the water is evaporated from the hydrate. It can be calculated as: mass of hydrate = mass of anhydrous + mass of water
Link: http://chemistry.bd.psu.edu/aronne/labhyds03.pdf-Lowell Kwan
ENTRY 3
Chemical Formulas:What is Sodium Thiosulphate Penta Hydrate?
Na2(S2O3).5H20
What is Sodium Sulphate Decahydrate?
NaSO4 . 10H2O
What is Sodium Acetate Dehydrate?
NaC2H3O2 .__ I am not sure about this. Does this mean it is not a hydrate, as dehydrate indicates no water.
-Lowell
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